I'd strongly advise against letting a contractor play architect. It will look like crap. I say spend the dinero to install the hot-tub indoors ( if I'm reading this right h: ).

If inside installation is out of the question, I'd need to get a feel for the exterior design of the house in order to weigh in on design for a gazebo. :dunno:

A good design can make the install look great, but a bad design can make the finished product look horrible.

My 2¥